The goal of this project is to examine the usefulness and validity of four standardized fitness tests in 48 patients with MDD. The four tests are: (a) Incremental bicycle ergometer test, (b) Åstrand-Rhyming bicycle ergometer test, (c) PWC-150/130 test (PWC150/130), (d) 6-minute walking test (6MWT)
Primary objective: To compare estimated maximal oxygen uptake (VO2max/peak) of patients with MDD based on standardized fitness tests and examine correlations between the estimated VO2max/peak scores of the different fitness tests.
Secondary objective A: To examine how the VO2max/peak scores of the four standardized fitness tests are associated with participants’ perceived fitness.
Secondary objective B:To examine the practicability of the four standardized fitness tests in a patient population suffering from MDD. Different parameters will be used to obtain a comprehensive picture of the practicability of each single test.